Allelopathic Assessment of Extracts of Cashew Leaf and Stem Bark on Cajanus Cajan L. Millsp Seed | Chapter 05 | Research Aspects in Biological Science Vol. 1

 The cashew tree, Anacardium occidentale, is a tough, drought-resistant tropical and subtropical tree. Pigeon pea (Cajanus cajan) is one of the most significant legumes in semi-arid tropical areas. The researchers looked at the effects of cashew leaf and stem bark extracts on pigeon pea seed germination. It took place in the Department of Plant Science and Biotechnology's laboratory at Michael Okpara University of Agriculture in Umudike, Nigeria. The experiments were carried out in Petri dishes filled with cotton wool that had been sterilised. The seeds were given various concentrations of aqueous extracts of cashew leaves and stem bark, namely 30 percent, 50 percent, and 70 percent, with distilled water serving as a control (0 percent). As the quantities of the aqueous extracts of both the cashew leaves and stem bark rose, they had a substantial (p 0.05) inhibitory effect on the germination percentage and rate of C. cajan. The cashew leaf extracts had the highest value of 70% (80.00%), whereas the control had the lowest value (96.66 percent ). Furthermore, the cashew stem bark extracts had the highest value at 70% (86.66%), while the lowest value was at control (96.00 percent ). The phytochemicals present in the tissues of A. occidentale had a considerable phytotoxic effect on the germination of C. cajan seeds, according to these findings.

Author(S) Details

N. H. Ifediora
Department of Plant Science and Biotechnology, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria.

F. Ukaegbu
Department of Plant Science and Biotechnology, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria.

View Book:- https://stm.bookpi.org/RABS-V1/article/view/6307

Does Salinity Enhance Allelopathic Effects of Tribulus terrestris L. in Citrullus Vulgaris Schrad. Agroecosystems at Nobaria, Egypt? Experimental Investigation | Chapter 02 | Recent Progress in Plant and Soil Research Vol. 5

 Field investigations in the summer of 2013 revealed that some undiscovered stressful factors had a significant impact on Citrullus vulgaris growth and yield in the Nobaria district of Egypt. Presumably, the problem was confined to the two combined causes of soil salinity and Tribulus terrestris inhibitory effects (a common weed dominant in C. vulgaris fields in the study area). Weeds are seen to be an important part of natural and agroecosystems, and their allelopathic activity has been linked to their success. Experiments in the field and in the lab were conducted to back up the previous hypothesis. The plant C. vulgaris was found to be harmed by the interaction of the two variables. The phytomass and leaf area index (LAI) of the study plant were considerably lower in the proximity of T. terrestris (bad weed management) than in the vicinity of T. terrestris (excellent weed management). In a laboratory test, the interaction of salinity and allelochemicals watery derived from T. terrestris plants had a significant impact on germination efficiency, hypocotyl-radicle length, and germination index of C. vulgaris when compared to the influence of just one factor. Finally, T. terrestris showed a significant suppressive effect on C. vulgaris growth and yield, which increased with modest or moderate salinity. Importantly, in desert agro-ecosystems, weed control is a critical technique for avoiding a wide range of interactions between crop-weed on the one hand, and weed-external climatic and edaphic factors on the other.

Author(S) Details

S. M. EL-Darier
Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.

R. S. Youssef
Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.

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Investigating the Allelotoxic Activity of Eucalyptus rostrata Schlecht. on Seed Germination and Seedling Growth of Chenopodium album L. and Portulaca oleracea L. | Chapter 11 | New Visions in Biological Science Vol. 6

 A range of allelopathic compounds have been found in Eucalyptus rostrata. Two noxious weeds, Chenopodium album and Portulaca oleracea, were studied for their allelopathic effect of Eucalyptus rostrata leaf (ERLAE) and bark (ERBAE) aqueous extracts on seed germination and seedling growth. Depending on the extract type and recipient species, the biological action of the two types of extracts on germination efficiency differs. The extracts had the following effect on the two weeds: ERLAE > ERBAE, and the action in C. album was practically as effective and substantial as it was in P. oleracea. The current study's findings suggest that the presence of allelochemicals in the aqueous extracts causes a slower rate of cell division and elongation, which results in shorter plumule and radical lengths. Finally, the findings of this study may help to solve the problem of excessive use of synthetic herbicides by applying and testing a variety of promising medicinal plants rich in allelochemicals, such as E. rostrata.

Author(S) Details

H. M. Abou-Zeid
Department of Botany and Microbiology, Faculty of science, Alexandria University, Alexandria, Egypt.

S. M. EL-Darier
Department of Botany and Microbiology, Faculty of science, Alexandria University, Alexandria, Egypt.

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Research on Allelopathy: Potential Wild Plant Species in Vietnam | Chapter 11 | Recent Progress in Plant and Soil Research Vol. 3

 Allelopathy is a widespread biological phenomena that occurs when an allelopathic plant creates allelochemicals that affect the growth, survival, development, and reproduction of other plant species in the same habitat, either positively or adversely. Wild plants are plants that are abundant in nature, have the ability to reproduce quickly, and contain a variety of physiologically active chemicals. Many investigations have demonstrated that wild plants can synthesise a wide range of allelochemicals. Mimosa pigra L., Leucaena leucocephala (Lamk.) de Wit., Wedelia trilobata (L.) Hitchc, Leucaena glauca Benth, and Ageratum conyzoides L. are prevalent wild plant species in Vietnam, and they overtake most cultivated land areas, reducing crop yield and growth. This review was based on the ability of some wild plants to inhibit weed species in order to discover possible plants that contain biologically active substances or compounds for herbicides with agro-ecosystem biosafety.

Author(S) Details

Tran Thanh Men
College of Natural Scieneces, Can Tho University, Can Tho City, Vietnam.

View Book:- https://stm.bookpi.org/RPPSR-V3/article/view/4487